The monsoon that has been lighting up the rest of Arizona has a second, meaner edge, and this one sets up southeast of Phoenix. The National Weather Service in Tucson expects storms to fire across Pinal, Pima, and Santa Cruz counties through the afternoon and into the evening, and the setup this time favors the organized, severe kind rather than the weaker cells that have been fizzling farther west. For anyone who has not driven through a desert storm like this, the danger is not really the rain.